My original tumblr post was here. This image was posted by don56 who identifies it as a cover of Dynamic Science Fiction (January 1954). The cover promotes a story by Sam Merwin, Jr., “The Final Figure.” Update: A commenter has found the story, and reports that the cover illustration is unconnected with it. It comes to us via twofistedpulp.
My original tumblr post was here. This image is a sci-fi story illustration with the caption “‘They’ll listen to you,’ Landers whispered, ‘You’ve got to tell them all to go home.'” It was originally posted by notpulpcovers.
My original tumblr post was here. This cover of Strange Detective Stories was first posted on tumblr by Mad Scientist Appreciation Guild, who added the text:
Weird Science and Detective Fiction… two greats tastes that go great together.
An alchemist is sort of like a mad scientist… right?
Right.
My original tumblr post was here. This image was first posted on tumblr by brudesworld, who added the text:
She stood, a great scarlet moth, hovering before flight…
The Man Who Mastered Time art by Virgil Finlay from Fantastic Novels Magazine, March 1950
My original tumblr post was here. These images were originally posted by Not Pulp Covers with the additional text:
Through The Asteroids — To Hell!
Blair Freedman had torn that tunnel through the grinding asteroid wall — the mighty Cutter… he’s die readily enough now to keep it open — but not with the girl he loved!
Planet Stories, Fall 1946
My original tumblr post was here. The image illustrates a story “Total Recall” by Larry Sternig with the “Buried under layers of horror in the old scientist’s brain was the only thing that could save the System — and Roger Kay had exactly half an hour to dig it out.” The image was first posted on tumblr by Not Pulp Covers with the additional text:
Shh,” said Roger gently. “Watch.” He drew her to the screen.
Planet Stories, Fall 1946
The image comes to us via doppelgaenger18.
My original tumblr post was here. This image was first posted on tumblr by Monsters in Love with the explanatory text “Cover of El País de los ‘Robots,’ a Spanish paperback from the 1950s.” It comes to us via doppelgaenger18.
My original tumblr post was here. “Thirteen Astray” is the best translation I can (easily) come up with from the Dutch “Dertien dwaalwegen.” I’m not sure what the underlying Robert Silverberg novel or collection was. The image was originally posted by Not Pulp Covers with a source link http://flic.kr/p/qB2ZcJ.
MY original tumblr post was here. This Summer 1944 cover of Planet Stories was first posted on tumblr by Damsel Lover and advertises stories by Leigh Brackett (“Terror out of Space”) and Ray Bradbury (“Morgue Ship”).
My original tumblr post was here. This is a cover of Amazing Mystery Funnies advertising the stories “Floating City Devils of the Deep” and “Skyrocket Steele.” It was originally placed on tumblr by retazosdered and comes to us via feeling-is-first.